PERCID^. 
505 
1836. Dules medms, L. Agassiz, ibid. p. 93, pi. xiii. fig. 4. [Imperfect 
fish ; Palaeontological Museum, Munich.] 
Ty^e. Imperfect fi.sh; olim Hartmann Coll., Goppingen. 
A verj? small species, attaining a length of about 0*1. Length of 
head with opercular apparatus about equal to the maximum depth 
of the trunk and slightly exceeding one third of the total length to 
the base of the caudal fin. Anterior dorsal fin with 7 or 8 spines, 
posterior dorsal with 1 spine and 8 or 9 articulated rays, the anterior 
origin as far from the occiput as the termination from the caudal 
fin ; the second to fourth dorsal spines about equal in size, their 
length not exceeding one half the depth of the trunk at their 
insertion, and scarcely exceeding that of some of the divided rays. 
Anal fin with 3 spines and 6 articulated rays, less than the posterior 
dorsal in extent; the second anal spine stoutest, but not longer than 
the third. 
Several examples of this species show the preoperculum charac¬ 
teristic of Cyclopoma, quite different from that of Smerdis. 
Form, Loc, Upper Eocene: Monte Bolca, near Yerona. 
P. 1924, P. 3917. Imperfect large fish, in counterpart, labelled 
Buies medius by Egerton. Egerton Ennislcillen Colls, 
36202. Slightly smaller imperfect specimen, deepened by distortion. 
Purchased, 1861. 
P. 1926,s^. 3903-04. Eive good specimens, most of them labelled 
by Agassiz, two in counterpart. 
Egerton ^ Ennislcillen Colls, 
P. 8955. Eine specimen 0’063 in length, in counterpart. 
Castelli Coll, 
13466. Two similar specimens, in counterpart 
Purchased. 
The following specimens from Monte Bolca seem to be immature 
individuals of this species, but are regarded as a distinct form,/Smm?f 5 
gjygmceus, by Agassiz, tom. cit. 1836, p. 53, pi. viii. figs. 3, 4:— 
P. 1927 a, b. The two type specimens of E. pygmceus, described and 
figured by Agassiz, loc. cit. Egerton Coll. 
P. 1927, P. 3905. Five specimens, two being labelled by Agassiz. 
Egerton Ennislcillen Colls. 
37222-24. Three specimens. Purchased, 1863. 
P. 290. Specimen in counterpart. 
Transferred from Mus. Practical Geology, 1880. 
